The SP481R and SP485R are pin-to-pin equivalent with our existing SP485 product and contain enhancements such as higher ESD tolerance and high receiver input impedance. The higher receiver input impedance allows for connecting over 400 transceivers on a single transmission line without degrading the RS-485 driver signal. Each device is packaged in an 8-pin plastic DIP or 8-pin narrow SOIC package. The SP481R offers a shutdown feature via the enable pins which will reduce the supply current (ICC) below 0.5µA typical.
The Sipex SP481R and SP485R are low‑power RS‑485 differential transceivers designed for 1/10th unit‑load operation, allowing more than 400 devices on a single bus. They feature high receiver input impedance, shutdown mode (SP481R), and are offered in lead‑free 8‑pin PDIP or NSOIC packages.
The document provides electrical characteristics, absolute maximum ratings, timing diagrams, package dimensions, ordering information, and environmental specifications for both parts. It also includes typical application circuits and test setups for verification.
| Maximum Data Rate | 5 Mbps |
|---|---|
| Common‑Mode Input Voltage Range | -7 V to +12 V |
| Input Impedance | 120–150 kΩ |
| Receiver Input Sensitivity | <200 mV |
| Operating Temperature (Industrial) | -40 °C to +85 °C |
The device operates with a common‑mode input range from –7 V to +12 V.
The transceiver supports a maximum data rate of 5 Mbps.